Colored asbestos product



IUUI UUlVlr UOI l IUIQ, COATING R PLASTIC. EXHmIHB 9 Patented Apr. 30,1940 I v UNITED STATES PATENT OFFICE COLORED ASBESTOS PRODUCT Marion S.Badollet, Fanwood, N. J., assignor to Johns-Manville Corporation, NewYork, N. Y., a corporation of New York No Drawing. Application December23, 1936,

\ Serial No. 117,344

Q Claims. (01. 106-)4) This invention relates to a colored asbestos somepurposes, I may use other asbestos fibres, product. as, for example,crocidolite, nfiasatear' tremolite' Many attempts have been madeheretofore to these latter three my Being use either color asbestosfibres in a manner to insure fastcommercial formafter activation, as bybeing 5 ness of the color either when employed alone an clave W1 mix 0ime or y'Tither activa- 5 or in compositions containing them. When ition rea en escribe in S. Patent 2,068,219 has been attempted to uselight-proof coloring issued to me on January 19, 1937. agents, such asthe common inorganic pigments, The cementitious material if used, issuitably there has been difliculty in obtaining firm anhydraulic. While!Have obtained especially good chorage of the pigments to the fibreswithout mm Portland figment, there may also be m the use of a thickpaint film or the like, which used such ot er cemen itious material ascalcium cause loss of fireproofness, flexibility, or other alumiwgcement or um laster. W properties that are desired in the finished as-The pigment is seiecigd to give the desired bestos product. color aimessto light. The pigment should The present invention comprises the methodbe very finely ground. Any one of a large num- 3 of causing properanchorage of pigment on the ber of pi g1 nents may be used, as, forinstance, asbestos fibres and the prfiucfi' resulting IFom ti'i'e'carbon black, w, chrome yellows meth'timt'rm "anchorage being used toinzinc oxide iitho ne and titanium oxide one clude penetration or otherintimate association or mixedwi o ers. an adequate to reduce to aminimum the removal'of Using the anehoring medium of the kind de- 10 thepigment from the fibres by washing with scribed, a very siialfamoifiitisadequate, this water or by rubbing lightly. proportion being less thanthat which would In general, the coloring agent or i ent is modifygreatly the stiffness or flexibility of an mixed with an anchorin'medium and the reindividual fibre or of a fabric containing the fibre. Usulting mixture is in orporatea into an asbesms For instance, I may usethe anchoring medium 26 3 cement compositio the like or upon as stos inproportion less than that of the pigments. if V nBres a] one. I haveused to advantage 0.4 part by weight of The anchoring medium is amaterial that low mey rgd gil to 3.6 parts of ig nent and 75 ers thesurface tensionoi water in contact thereparts of ghrysotile fi res Whilethe 30 with and, wheti'emulsified with w ter and then proportion of theanchoring medium may be 80 mixed with asbestos fibres, becomes argelyassovaried, I prefer to use proportions ranging from ciated with thefibres. Thus, the medium is about 0.2 to 1 part by weight to 100 partsof the separated ircm theaqueous emulsion anddrawn fibres. into thefibres, carrying with'it pigmentcirighial The invention will beillustrated more specifily intimately'infxed'witl'i tl'iemedium. callyby the following detailed descriptions of 35 q I prefer to use, as theanchori medium a typical compositions made in accordance with sulfonatedoil, such as sulfonaEH castor 05, 541k the invention. ionated productsof oxidized'sohd or li'qfia paraf- In making a colored asbestos cementsheet, Wit enic y rocar us, or su ona ion there is formed an intimatemixture of 9 parts 40 products of moi pfronounceH by weight of i mentand 1 part of Turkey red 0 '13d surface-tension lowering ram iiemy inoilwetting agent. e resulting mixture is HE- I venti' on is not limited toany 'tfieory of explanapersefi'm a large amount of water say 900 parts.tion of the firmness of anchorage secured, the an- Into the dispersionthere is then introduced. 200 choring media that serve best my purposeare parts of chrysotile asbestos fibres (Canadian) of those adapted toreactchen icallywih relatively s or re eng such as commonly 46 fibresand, for that'reaszinrbecome diflicultl y reused in the manufacture ofasbestos cement movable or completely irremovable upon washshingles,parts of finely divided silica such as ing with water. Thus, sulfonatedcastor oil, ground sand and parts of Portland cement. commonly known asTurkey red oil, may react The resmting composition 15 Eaped into a 50with an alkaline eart me s1 ica e of asbestos, sheet and stronglycompressed, as, for instance, 50 to give a 'water-insolubleproductincluding probin the filtering bed of a hydraulic press of the ably analkaline earth metal ricinoleate or a detype that is in commercial usefor the pressing rivative ereof. of asbestos cement sheets. During thepressing Asbestos fibres that I have used to advantage operation a largepart of the water, in excess II are of the variety known as cmsotile.For of that required to cure the Portland cement, is I.

expressed. The product is removed from the press and allowed to harden.

The product so made contains the pigment predominantly associated withthe asbestos fibres so that they are more intense l y cploredifian theintervening matim men t. The coldF'iEhot "removed from the fibr sfiywashing with water or rubbing lightly, the reason for the firmness ofanchorage being probably due largely to chemical combination of theanchoring medium with the fibres.

In a preparationomitting the cement, there J were mixed 73 parts byweight oias'bestiis fibres,

3 parts of arl starch, 3.6 parts of i ment (dry weight), 0.5 partanchoring medium red oil), and a very large volume of water, to formmute suspension in a pa heater, The resulting composition was ormed intoa felt on a paper machine.

In making the above mixture for formin into a paper the pigment wasfirst intimately mixed Wl e anchoring medium, to form a thick paste, thepigment being well dispersed in the oily medium, as by a conventionalmeans, as, for

5 example, by being mixed roughly and then sent 0 at an elevatedtemperature to remove water.

Thus, the paper may be dried at a temperature of about 212 F. orslightly higher, the temperature of drying being below that which, ifused, would decompose the starch or other organic material present.

The paper so made is useful as fireproof or fire-resistant decorativepaper.

The asbestos cement product, made as described stove and including 'th'epigmented fibres, is useful for purposes for which asbestos cement boardis commonly used.

In case there is objectionable foaming during heating or mixing of theseveral materials, in the process described, mineral seal oil should beadded to the anchoring m ium an emulsified. This mixture is then usedfor dispersing the pigment, so that foaming is minimized during. theperiods of agitation in the heaters or cylinder vats. The mineral oil byits surface activity destroys the foam rapidly.

It will be understood that the details given are for the purpose ofillustration, not restriction, and that variations within the spirit ofthe invention are intended to be included in the scope of the appendedclaims.

What I claim is:

1. A colored asbestos product comprising an intimate mixture of asbestosfibres, a hydraulic cementitious material in hardened condition, apigment predominantly associated with the fibres, anda small proportionof a pigment anchoring medium selected from the group consisting ofsulphonated castor oil, sulphonated products of oxidized solid or liquidparaflinic or naphthenic hydrocarbons, or sulphonation products of thehigher alcohols of pronounced surface-tension lowering property extendiminto the fibres and being chemically combined therewith.

2. A colored asbestos product comprising an intimate mixture of asbestosfibres, a hydraulic cementitious material in hardened condition, apigment, and a sulfonated oil, the said pigment and sulfonated oil beingassociated predominantly with the fibres and adhered thereto.

3. Colored asbestos comprising asbestos fibres, a pigment, and a pigmentanchoring medium selected from the group consisting of sulphonatedcastor oil, sulphonated products of oxidized solid or liquid parafiinicor naphthenic hydrocarbons, or sulphonation products of the higheralcohols of pronounced surface-tension lowering property, the pigmentbeing dispersed in the medium and the medium being chemically combinedwith the fibres.

4. Colored asbestos comprising asbestos fibres, a pgment, and asulfonated oil, the oil being intimately associated with the pigment andchemically combined with the fibres.

5. Colored asbestos comprising asbestos fibres, a pigment predominantlyassociated with the fibres, and an anchoring medium therefor, saidmedium being selected from the group consisting of sulphonated castoroil, sulphonated products of oxidized solid or liquid parafllnic ornaphthenic hydrocarbons, or sulphonation products of the higher alcoholsof pronounced surface-tension lowering property, the pigment and mediumbeing intimately associated with each other, and the proportion of thesaid medium being substantially less than the proportion of the pigment.

MARION S. BADOLLET.

